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25. Five peseta coins from Spain were dropped into a graduated cylinder containing 20.20 mL of water.
The volume of the water increased to 22.05 mL. A single coin had a mass of 0.99 gram. What is the
identity of the metal used to make the peseta coins?
A. zinc (density = 7.1 g/mL)
B. copper (density = 9.0 g/mL)
C. silver (density = 10.5 g/mL)
D. aluminum (density = 2.7 g/mL)

Respuesta :

michell96

The identity of the metal used to make the peseta coins is Aluminum (density = 2.7 g / mL)

To know the identity of the metal used to make the peseta coins, it is necessary to carry out the following steps.

1. Identify the total mass of the pesetas. To do this, multiply the mass (0.99) by five (number of pesetas used)

0.99g X 5g = 4.95g

2. Identify the difference in mL of water before and after adding the pesetas. To do this, the initial value is subtracted from the final value.

22.05mL - 20.20mL = 1.85 mL

3. To identify the density and the material used, it is necessary to divide the total grams of pesetas (4.95g) into the mL that the water increased (1.85 mL)

4.95g / 1.85mL = 2.67 g / mL

This result is close to 2.7 g / mL.

According to the above, the correct answer is D.

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